this morning, deadly winter storms hammering cities across the country. in the southwest, rain, sleet, snow, creating very dangerous conditions for drivers, even forcing some cars to spin out of control. >> wow, that's cincinnati, but in the dallas-ft. worth area, alone, the ice storm has knocked out power for more than 200,000 customer us. >> yeah, the weather is so severe, it is also causing a travel nightmare for a lot of flights. the main airport there in dallas, canceled 700 flights friday. the storm is already being blamed for at least four deaths across the country. >> in tennessee and arkansas, governors have declared a state of emergency and it's not over yet. severe weather is now moving east, just as the new storm is expected to hit. >> we're covering this story from all angles. let's begin with ed lavandera in snow, cold dallas this morning. officials, ed, have called off tomorrow's marathon because of this bone-chilling winter weather, is that right? >> reporter: they have. it's the first time in the history of that event it's been canceled.